{"id":"CVE-2021-47865","aliases":["EUVD-2026-3621","GHSA-mf77-27mv-mhm4","UBUNTU-CVE-2021-47865"],"status":"published","title":"ProFTPD 1.3.7a - Remote Denial of Service","description":"ProFTPD 1.3.7a contains a denial of service vulnerability that allows attackers to overwhelm the server by creating multiple simultaneous FTP connections. 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Attackers can repeatedly establish connections using threading to exhaust server connection limits and block legitimate user access.","status":"published","published":"2026-01-21T17:27:44.167Z","modified":"2026-04-07T14:06:22.298Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:32:56.308189Z"}],"euvd":[{"id":"EUVD-2026-3621","description":"ProFTPD 1.3.7a contains a denial of service vulnerability that allows attackers to overwhelm the server by creating multiple simultaneous FTP connections. 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Attackers can repeatedly establish connections using threading to exhaust server connection limits and block legitimate user access.","status":"published","published":"2026-01-21T18:16:00Z","modified":"2026-10-17T12:56:16.328989139Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:53:51.630172Z"}]}}